Yes, I finally got around to seeing Dreamgirls last night. It was a good story, and Jennifer Hudson can really sing, but I really didn't LIKE any of the characters. Effie was a prima donna, the other girls were just too willing to do whatever the men told 'em to do, and most of the men were either druggies (Eddie Murphy), cold calculating jerks (Jamie Foxx's character) or spineless (the guy who played Effie's brother). And frankly, the movie could have been shorter and still gotten the point across... (but that would've meant they couldn't shoehorn all those musical numbers in.)
Instead of Dreamgirls, I recommend another movie about the music scene in the '60s -- Grace of My Heart with Illeana Douglas. Now *that* movie is amazing.